<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style>
			body {
				min-width: 550px;
				/* 2x leftContent width + rightContent width */
				font-weight: bold;
				font-size: 20px;
				margin: 0;
				padding: 0;
			}

			#header,
			#footer {
				background: rgba(29, 27, 27, 0.726);
				text-align: center;
				height: 60px;
				line-height: 60px;
				clear: both;
			}

			#container {
				padding: 0 200px;
				background-color: red;
				overflow: hidden;
			}

			.column {
				height: 200px;
				float: left;
				position: relative;
			}

			#left {
				width: 200px;
				margin-left: -100%;
				left: -200px;
				background-color: aqua;
			}

			#right {
				width: 200px;
				margin-left: -200px;
				right: -200px;
				background-color: wheat;
			}

			#center {
				width: 100%;
				background-color: tomato;
			}
			
		</style>
	</head>
	<body>
		<div id="header">这是头部盒子</div>
		<div id="container">
			<div id="center" class="column">这是中间盒子的中间盒子</div>
			<div id="left" class="column">这是中间盒子的左边盒子</div>
			<div id="right" class="column">这是中间盒子的右边盒子</div>
		</div>
		<div id="footer">这是底部盒子</div>
	</body>
</html>
